Things You'll Need
Instructions
Put on the gloves. The U.S. Mint suggests soft cotton gloves for handling rare coins to avoid scratching or damaging the coins.
Place the coin on the jeweler's tray, which is a soft tray designed to prevent damage to soft metals. Place the tray under a good light source. Direct light is necessary to see any flaws.
Look at the coin through a magnifying glass. Look for scratches or damage to the coin. Scratches and damage bring down the value of the rare coin. The U.S. Mint has a page on its website designed to show the coin grading scale based on coin wear and tear. Grading has some influence on the overall value, though the rarest coins will be worth a lot even when damaged.
Look in a coin reference book. According to the U.S. Mint, a coin reference book should contain information that includes the dates of the coin, the varieties of the coin produced, grading for the coin, overall value and value related to the grading and the marks from the mint. The coin reference book helps determine the ultimate appraisal value of the coin.